April 9, 20224 yr Following on from my other post . Some very dirty quoins ! . Pressure wash won’t touch it - any way to clean them up a bit ? Secondly my shuttering leaked a bit over my wall . Some ‘ smeary ‘ cement on it . Brushing it when dry helped a bit - but a recommended product to clean it up a bit appreciated.
April 9, 20224 yr Author Looking at this type of thing on Amazon ; not sure it it’s right for the job though …
April 9, 20224 yr Author 43 minutes ago, joe90 said: I use this, found it very good Yeah but mines called “ wet & forget “ - reminds me of school
April 9, 20224 yr That Bostik type stuff cleans Mortor stains as well so may clean up after your coping stone bedding 🤷♂️
April 9, 20224 yr I use wet and forget for green build up on paths etc. I think the brick acid would be a better shout
April 9, 20224 yr Author Ok ok , I’ll forget “ wet & forget “ ( though the product name is the best ! ) . Ordered the boringly named bostik “ mortar and brick cleaner “
April 13, 20224 yr Author On 09/04/2022 at 15:20, joe90 said: I use this, found it very good This stuff was good on the random stone . 1 : 4 mix with water at first . Always scared the acid will burn the entire wall away ! . Went over more stubborn bits later with it neat . Does the job 👍 Says not to use on sandstone. So tried my favourite ‘ wet & forget ‘ on them - jury is still out . According to the reviews you need to leave it and be patient…
April 13, 20224 yr Author Tried now both products on the quoins - no real joy . On eBay I see ‘ memorial head stone cleaner ‘ 🙄🙄🙄😁
April 13, 20224 yr Wet and forget is a selective herbicide so good for algae. Etc but that’s not what you have on the wall.. get the acid on And then washed off
April 13, 20224 yr Author 12 minutes ago, TonyT said: Wet and forget is a selective herbicide so good for algae. Etc but that’s not what you have on the wall.. get the acid on And then washed off Acid on random stone is good . But what should I use for the quoins / copings ??
April 13, 20224 yr Around @pocster,s area stone goes black from Avonmouth (an industrial area and docks with a history of pollution) I know because I used to live close by (but escaped 😇).
April 13, 20224 yr Author 6 minutes ago, joe90 said: Around @pocster,s area stone goes black from Avonmouth (an industrial area and docks with a history of pollution) I know because I used to live close by (but escaped 😇). Yes . They do go black . Real black some of them ; so technically it’s “dirt” from pollution ????
April 13, 20224 yr Possibly worth looking at something like Lithofin Power-Clean which is very good at ingrained dirt on stone. It’s alkaline so doesn’t dissolve like an acid will.
April 13, 20224 yr Isn't there restriction on buying acid for cleaning after that woman was blinded by her ex with it. And "Watch and Wipe" is a much better trade name.
April 13, 20224 yr 2 hours ago, bassanclan said: For headstones use high concentration bleach. I think a brand of it is HCL BC5L? everbuild acid ?
April 14, 20224 yr Author Will try the LithofinPower-Clean as recommended by @PeterW Reluctant to use acid unless I really have to and equally the same with bleach .
April 14, 20224 yr 3 minutes ago, pocster said: Reluctant to use acid unless I really have to and equally the same with bleach Why I think that cement is alkaline, so the acid will remove it, and not damage the stone to much, which is lower down the pH scale. Bleach acts as an alkaline solution, so is probably heading in the wrong direction. It is all to do with the free electrons and the movement of ions, not that I really understand it.
April 14, 20224 yr Author 2 minutes ago, SteamyTea said: Why I think that cement is alkaline, so the acid will remove it, and not damage the stone to much, which is lower down the pH scale. Bleach acts as an alkaline solution, so is probably heading in the wrong direction. It is all to do with the free electrons and the movement of ions, not that I really understand it. As you say . Don’t want to damage the stone . Also environmental trying to avoid acid and bleach .
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